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datainvolves three steps.

Step 1: Arranging the given data in ascending or descending order

Step 2: Find the largest number and smallest number in the data

Step 3: Finding the difference between them.

test scores.

Step 1: Arranging the data in ascending order

48, 66, 68, 78, 79, 91, 94

Step 2: Finding the largest and smallest number

Largest number = 94

Smallest number = 48

Step 3: Finding the difference between the largest and smallest numbers.

Range = 94 – 48 = 46

Hence the range of his test score is 46.

data.

Step 1: Arranging the data in ascending order

$5.50, $6.00, $7.80, $8.60, $9.30, $12.40, $18.20

Step 2: Finding the largest and smallest number

Largest number = $18.20

Smallest number = $5.50

Step 3: Finding the difference between largest and smallest number.

Range = $18.20 - $5.50

= $12.70

Hence the range of the wages of employee is $12.70.